3-Chloro-3-methyl-butane-1,4-dial-bis-acetals and 3-methyl-but-2

Details 3-Chloro-3-methyl-butane-1,4-dial-bis-acetals and 3-methyl-but-2 3-Chloro-3-methyl-butane-1,4-dial-bis-acetals and 3-methyl-but-2

1979-09-17

1981-03-17

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D31904

Patent

active

042566436

ABSTRACT:
3-Chloro-3-methyl-butane-1,4-dial-bis-acetals and 3-methyl-but-2-ene-1,4-dial-bis-acetals are obtained by reacting a six-membered cyclic acetal of 3-methyl-but-3-en-1-al with an alkyl nitrite in the presence of methanol and hydrogen chloride and, if desired, eliminating HCl in the conventional manner.
The butanedial-bis-acetals and butenedial-bis-acetals are valuable intermediates through which the trans-3-methyl-but-2-ene-1,4-dial-1-acetals, which are sought-after products for terpene syntheses, can be obtained in an industrially particularly advantageous manner.

REFERENCES:
patent: 3671590 (1972-06-01), Wiese et al.
patent: 4120868 (1978-10-01), Jaedicke et al.
Chem. Abstracts, vol. 62, 6396h.
Chem. Abstracts 86, 106678t.
Chem. Abstracts 65, 7853r.
Chem. Abstracts-8th Coll. (m-dioxane-2,2'-vinylenebis derivs.)

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